Metal fastening device



(Nu Model.)

U W DE D G m w WT IS Gm ..L GA T E M No. 595,000. Patented De0,7,1897.

II Il A Hi "In! I UNTTnn STATES PATENT OFFICE.

GEORGE GILBERT IVYLAND, OF VVILLIAMSPORT, PENNSYLVANIA.

METAL FASTENING DEVICE.

SPECIFICATION forming part of Letters Patent N 0. 595,000, datedDecember '7', 1897. Application filed March 29, 1897. Serial No-629,698. (No model.)

To aZZ whom it may concern:

Be it known that I, GEORGE GILBERT WY- LAND, a citizen of the UnitedStates, residing at lVilliamsport, in the county of Lycoming and Stateof Pennsylvania, have invented certain new and useful Improvements inMetal Fastening Devices; and I do hereby declare that the following is afull, clear, and exact description of the same, reference being had tothe annexed drawings, making a part of this specification, and to theletters of reference marked thereon.

The present invention has reference to that class of metal fasteningdevices for wood joints designed to take the place of the ordinaryscrews or nails and formed of flat sheet iron or steel bent to thedesired shape.

It is the object of the invention to improve the construction of theabove class of fastening devices, whereby greater strength, durability,and effectiveness are obtained; and it consists in a device constructedsubstantially as shown in the drawings and hereinafter described andclaimed.

Figure 1 of the drawings is a perspective view showing a wood joint heldtogether by my improved fastening device. Fig. 2 is a perspective viewof the fastening device; Fig. 3, a side elevation thereof.

In the accompanying drawings, A B represent the two adjoining portionsof a boxboard or other object to illustrate the application of thefastening device thereto.

The fastening device is constructed from a rectangular piece of sheetsteel, iron, or other suitable metal and bent in the form shown in Fig.2 of the drawings.

Thisfastening device (represented at C) has its bottom or under edge aformed sharp, so as to be easily driven into the wood, and its oppositeedge roughened or serrated,as shown at b, so as to make it susceptibleto the touch to quickly distinguish between the two edges when handlingthe fastening device to place it in position for driving into the wood.The sharp edge a is much longer than the serrated or roughened edge Z),or, in other words, the device flares at its ends, so that the distancefrom c to d is greater than the distance from e to f, as shown moreclearly in Fig. 3 of the drawings. This forms an important feature atthe center of the device, substantially as in the device, as it tends todraw the joint together when driven into the wood.

The central portion or legs of the device are formed at their sides withflat-sided obtuse angles 9, thereby increasing the Width of the deviceat its center or midway of its ends. This central portion of the devicebeing directly over the joint and being wider, as above described,renders the joint much stiffer and firmer.

The outer ends of the fastening device are formed, respectively, with aclosed heel h and outwardly-curved flanges '5 to prevent the wood frompulling out at these points.

The apex of the obtuse angles 9 forms the widest part of the device, andat each side of the angles are the straight portions Z.

The heel of the device, as well as the curved flanges opposite thereto,may be changed or modified without departing from the principle of myinvention, although the curved flanges are preferable, as greaterstrength is obtained.

Having now fully described my invention, what I claim as new, and desireto secure by Letters Patent, is

1. A sheetmetal fastening device comprising two legs, each having itscentral portion formed of obtuse angles to increase the width 8o andforthe purpose set forth.

2. A sheet-metal fastening device comprising two legs, each tapering orflaring at its ends to give to the sharpened edge a greater length thanits opposite edge and at their central portion formed of obtuse anglesto increase the width at its center, substantially as and for thepurpose specified.

3. A sheetn1etal fastening device comprising two legs, each tapering atits ends and provided respectively with sharpened and serrated edges andtheir central portion formed with obtuse angles to increase the widththereof, substantially as and for the purpose specified.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

' GEORGE GILBERT WVYLAND.

Witnesses:

J. WV. PUTNAM, Gno. O. WYLAND.

